Hand operated laboratory instrument



FIG. 1 is a perspective view of a hand operated laboratory instrument in accordance with my new design as seen from the left rear;

FIG. 2 is a perspective view of a hand operated laboratory instrument as seen from left front;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 a perspective view of a modified hand operated laboratory instrument in accordance with my new design as seen from the right rear;

FIG. 10 is a perspective view of the modified design as seen from the left front;

FIG. 11 is a rear view of the modified design;

FIG. 12 is a front view of the modified design;

FIG. 13 is a left side view of the modified design;

FIG. 14 is a right side view of the modified design;

FIG. 15 is a top view of the modified design; and,

FIG. 16 is a bottom view of the modified design.

The broken lines in the drawings depict portions of the hand operated laboratory instrument that form no part of the claimed design.

The hand operated laboratory instrument or hand operated laboratory tool is used to take up a volume of fluid from a container, and, afterwards, to dispense it into another container or into multiple other containers. In particular, it serves for the repeated dispensing, titrating or pipetting of liquids. 

CLAIM The ornamental design for a hand operated laboratory instrument, as shown and described. 